This study investigates the mechanical performance and process optimization of hybrid composite lattice structures fabricated via Stereolithography (SLA). To enhance the structural integrity of additively manufactured components, an ABS-like resin was reinforced with glass fiber and varying concentrations of graphene (0.05, 0.1, and 0.2 wt.%). Three different lattice topologies (Truncated, Kelvin, and Fluorite) were designed and subjected to quasi-static compression tests. The Taguchi method (L9 orthogonal array) and ANOVA were employed to identify the optimal manufacturing parameters. Results indicated that the Truncated lattice reinforced with 0.1 wt.% graphene exhibited superior mechanical properties, achieving a peak stress of 5.085 MPa and an energy absorption (EA) of 49.93 kJ/m3. Microstructural analysis via SEM revealed that while 0.1 wt.% graphene provided effective reinforcement, higher concentrations (0.2 wt.%) caused agglomeration, leading to stress concentrations and premature brittle fractures. Statistical analysis confirmed that graphene content is the most significant factor affecting energy absorption (58.2% contribution). This work establishes a clear structure–property relationship for SLA-fabricated hybrid composites, offering an optimized route for developing lightweight, high-strength structures. Fabrication of hybrid composite lattice structures via SLA using graphene and glass fiber. Microstructural analysis revealed particle agglomeration at 0.2 wt.% graphene reinforcement. Truncated lattice with 0.1 wt.% graphene exhibited the highest compressive strength of 5.085 MPa. Maximum energy absorption of 49.93 kJ/m³ was achieved in the optimized truncated lattice design with 0.1 wt.%. ANOVA results identified graphene content as the dominant factor (58.2%) on energy absorption.
Orak et al. (Fri,) studied this question.